I have just recently installed a 12 volt system in my 1960 'canned ham' and was thinking about buying a converter for it but they seem to be somewhat expensive. My brother-in-law suggested that I hard wire a good battery charger in that will keep my batteries topped up while I have a 120 volt hook up. I already have a nice 12 volt fuse block that I just put in and don't really want to get rid of it. Anyone done this before? Any suggestions for a good battery charger (I have 2 six volts hooked together). I am only going to be using it to light up a maximum of 4 lamps, and a car stereo. Thanks for your advice.